CCIE SP - IS-IS - Initial + Full Configs

Intermediate System to Intermediate System (IS-IS) is a link-state interior gateway protocol (IGP) widely used in service provider and large enterprise networks due to its scalability, fast convergence, and protocol flexibility.

Unlike OSPF, IS-IS runs directly over Layer 2 (without IP encapsulation), making it highly efficient for large-scale routing. It supports multi-level hierarchy (Levels 1 & 2), ECMP (Equal-Cost Multipath Routing), and seamless integration with MPLS and segment routing.

This lab provides hands-on experience configuring IS-IS adjacency formation, area design, metric tuning, route propagation, and authentication, ensuring you're fully equipped to implement and troubleshoot IS-IS in CCIE SP environments.

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